Window-cleaning device



i Patented Nov. 1927.

UNITED STATES 1,647,138 PATENT OFFICE.

MATITJDA A.. KIBKWOOD, 0F PITTSFIELD, MASSACHUSETTS.

WINDOW-MEANING, DEVICE.

Application nled February 25, 1827. Serial No. 170,996.

. I have provided an air blast for preventing the deposit of snow, moisture, etc., on the such as to deflect the falling or floating 'mois-4 ture, snow, etc., from a path which would cause it to collide with the surface of said window, windshield, etc. over a predetermined portion of said surf-ace which it is desiredto protect from such deposit. For the dissipation of such snow, moisture, etc., as may pass thru the above mentioned air blast and'be deposited on the surface of said wn. dow, windshield, etc., as well as to prevent the accumulation of moisture on the innerI -surface of said window, windshield, etc., 'I

have. provided a second air b'last which is directed angularly against the outer surface of same and which is heated to a sucient temperature toinsure evaporation of any deposited moisture before it shall have .had time to collect in any considerable quantity.

I have also provided means for the control, manually, of the force, temperature and location of said air blasts.

One method of accomplishing the above results is illustrated in the accompanying drawing in which:

Figure l-is a frontelevat'ion of the air blast nozzle.v

Figure 2 is a sectional side eleva-tion showing the device as installed in the vestibule of a street car.

Figure 3 is a section thru the nozzle as at 3 3. r

Referring now in detail to the drawing by means of the numerals: 1 refers to a nozzle comprising a storage chamber 20 connected by means of passages 7 with a distributing chamber 21, chamber 21 being provided with perforations 6. The object, and result, of' this arrangement is to maintain a nearly uniform pressure at all of perforations 6. Perforations 6 are arranged 1n two groups, one of which is angularly disposed with relation to the plane of the window .pane 24,

against which the `nozzle 1 bears, in such manner as to direct the air outwardly, away vfrom `surfacel'of said window pane 24, the other group -of perforations 6 is disposed around the inner wall of nozzle 1 in a similar manner to the above mentioned group but disposed to the plane of window 24 in such a manner as to force a blast of air angularly/ against said surface.

Air is furnished to nozzle 1, thru tube 8 yand flexible tube 9, by air compressor V10.

The output of air compressor 10 bears such a'relation to the combined areas of perforaglass, the direction of said air blast being tions 6 and the combined volumes of chambers 20 and 21 `and tubes 8 and 9 as to insure a-inal temperature of the air (due solely to the work of compression thereof) sufficiently high to -cause prompt melting of anyv snow deposited as well as evaporation of the moisture formed thereby or vdeposited directly.

The heat given up by the air blast also heats window pane 24 sufficiently to prevent deposit and condensation of any moisture on the inside of said window pane.

Air compressor 10 is driven by eccentric 12 in combination with compression spring 15 thru follower 13 and piston'rod 14. The output of air compressor 10 is limited by means of adjustable stop lever, 17 vwhichis manually controlled by means of rod 16 hand lever 18 and quadrant 19.A Hand lever 16 is arranged `to clamp to quadrant 19 and thus secure saine in any desired position,I thereby insuring a continuance of any desired air output and consequent pressure and temperature within the range of the device. The rod 16 is provided with a compression spring 25 which rests against the stop 26, and is held in position by means of the collar 27, which collar is rigidly secured to the rod 16. The purpose .of the compression spring is to vfacilitate the upward motion of the rod 16.

Nozzle 1 is suspendedbefore window pane 24 by means of rods` 2 and nuts 23 and is f provided with bosses 5to insure sufficient space between said nozzle and window pane 24 to permit drainage of any condensed moisture or melted snow, etc. between them as well as to permit a certain portion thereof to be blown thru same by the air blast. It is evident from the above that the position ofnozzle 1 andconsequently of the clear space on window 24 is adjustable in a vertical direction, by means of rods 2 and nuts 23, to suit the convenience of operators of `the fluid into' a distributing chamber adja' cent the said storage chamber, means for ad-f justing the position of said nozzle in a vertical direction'before said Window pane.'

Y 2; In a device of the classjdescribed coin-- on the part-of the operator.

various heights," as well as to accommodate itself to either a standing or sitting posture Havingythus described my invention, what I claim as new and desireto secure by Letters Patent -of the United States' is:

1 LIn a device of the class described comprising a nozzle-supported adjaeent'awindow pane, said nozzle provided with Yalsto'rage chambereonnected with a source supplying fluid under pressure, means to direct prising anozzle supported'adjacent a Window' pane,.said nozzle provided with a storage chamber vconnected with aY source supplying fluid under pressure, means to direct the fluid into a distributing chamber adjacent the said storage chamber,`said distributing chamber provided with a. plurality of perforations leading therefrom, some of said perforations being angularly inclined to- 'wards theplane of'said window, others being outwardly inclined angularly away from said window pane, means for adjusting the position of said nozzle in a vertical direction ybefore said windowA pane, means for' plying fluid underpressure, said storage chamber connected at diverse points, y by,

means -ofrperforationa with a distributing chamber, said ydistributing chamber provided with a plurality of perforationsv leading therefrom, some of saidperforations being angularlyvi-nclined towards the plane of said.

Window, othersV beingoutwardly inclined angularly away from said Window. pane,

,bosses lattached to said nozzle and bearing against said' window pane maintaining a definite space between Ait and said nozzle, means for adjusting the position of said nozzle in a vertical direction before said window pane.

4: In a device fof the" class described comprising a nozzle supported adjacent a win--A dow pane, saidvn'ozzle provided with a storage chamber connected with asource supplying fluid under Dressure, a. distributing chamber 'adjacent the said storage chamber,

said distributing chamber separate-and distinct from the said storage chamber and connected thereto by means of perforations at l diverse points to permit a nearly uniform pressure of the fluid from the storage chainbei-'into the distributing chamber, said distributing chamberd provided with a plurality of perforatioiis leading therefrom, some of said perforations being angularly inclined towards the-"plane Vof said window', othersbeing outwardly inclined Vangularly away,

from .said window, bosses attached to said nozzle and bearing againstv said window i pane maintaining a definite space between it`- and said nozzle,- nieans for adjusting the position of said ngzzle in a vertical direction before said window pane.

In testimony whereof I afliX my signature.

Mai-nina A. KiRKWooD. 

